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Steel material and processing technology for ball screw

A technology of ball screw and processing technology, which is applied in the field of steel materials, can solve problems such as limited hardenability, difficulty in improving surface precision, and difficulty in hardened layer, so as to improve wear resistance, contact fatigue strength, and service life. Economic and social benefits, the effect of reducing heat treatment distortion

Active Publication Date: 2014-08-20
SHANDONG BEST PRECISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since GCr15 bearing steel is a high-carbon, high-Cr alloy steel, it has been found during many years of use that the following problems exist in the production of ball screws from this material: a. Hardenability has certain limitations, it is difficult to obtain a deep hardened layer, suitable for small and medium diameter screw
c. Due to high Cr, it is easy to form carbide structure that is not easy to change, resulting in large quenching deformation of the material, unstable cold working process, difficult to improve surface accuracy, and difficult to make high-precision screw
d. The processing stress is large and the efficiency is low, especially in grinding processing, where grinding cracks often appear

Method used

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  • Steel material and processing technology for ball screw
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  • Steel material and processing technology for ball screw

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Effect test

Embodiment 1

[0075] Embodiment 1 of the present invention provides a steel material for a ball screw, which is composed of the following components in weight percentage: 0.58% of carbon element, 0.25% of silicon element, 0.86% of manganese element, 0.035% of phosphorus element, and 0.029% of sulfur element %, 0.90% of chromium, 0.25% of molybdenum, 0.10% of vanadium, 0.27% of nickel and 0.25% of copper, and the rest of iron and impurities.

[0076] Embodiment 1 of the present invention also provides a processing technology for processing the ball screw by using the above-mentioned steel material as follows:

[0077] Hot-rolled steel—quenching and tempering treatment, straightening—rough turning outer circle—high temperature aging treatment, straightening—finish turning outer circle—surface induction hardening, tempering—grinding outer circle—hard milling thread or grinding thread—assembly.

[0078] Among them, the processing technology only includes the above three heat treatments, namely:...

Embodiment 2

[0110] Embodiment 2 of the present invention provides a steel material for a ball screw, which is composed of the following components in weight percentage: 0.61% of carbon element, 0.33% of silicon element, 0.88% of manganese element, 0.015% of phosphorus element, 0.035% of sulfur element, 0.90% of chromium element, 0.31% of molybdenum element, 0.10% of vanadium element, 0.31% of nickel element and 0.28% of copper element, and the balance of iron element and impurities.

[0111] Embodiment 2 of the present invention also provides a processing technology for processing the ball screw by using the above-mentioned steel material as follows:

[0112] Hot-rolled steel—quenching and tempering treatment, straightening—rough turning outer circle—high temperature aging treatment, straightening—finish turning outer circle—surface induction hardening, tempering—grinding outer circle—hard milling thread or grinding thread—assembly.

[0113] Among them, the processing technology only incl...

Embodiment 3

[0144] Embodiment 3 of the present invention provides a steel material for a ball screw, which is composed of the following components in weight percentage: 0.57% of carbon element, 0.13% of silicon element, 0.85% of manganese element, 0.035% of phosphorus element, 0.035% of sulfur element, 0.80% of chromium element, 0.20% of molybdenum element, 0.06% of vanadium element, 0.32% of nickel element and 0.27% of copper element, and the balance of iron element and impurities.

[0145] Embodiment 3 of the present invention also provides a processing technology for processing the ball screw by using the above-mentioned steel material as follows:

[0146] Hot-rolled steel—quenching and tempering treatment, straightening—rough turning outer circle—high temperature aging treatment, straightening—finish turning outer circle—surface induction hardening, tempering—grinding outer circle—hard milling thread or grinding thread—assembly.

[0147] Among them, the processing technology only incl...

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Abstract

The invention discloses a steel material and a processing technology for a ball screw. The steel material comprises the following elements by weight: 0.58% of carbon, 0.25% of silicon, 0.86% of manganese, 0.035% of phosphorus, 0.029% of sulphur, 0.90% of chromium, 0.25% of molybdenum, 0.10% of vanadium, 0.27% of nickel and 0.25% of copper, with the balance being iron and impurities. The invention has the following beneficial effects: the invention provides a novel material and processing technology for the ball screw, the processed ball screw can totally overcome disadvantages of the GCr15 material during processing, heat treatment distortion and grinding cracks are reduced, processing efficiency is improved, wear resistance, contact fatigue strength and service life of the ball screw are enhanced, and good economic benefits and social benefits are obtained.

Description

[0001] technical field [0002] The invention relates to steel materials in the technical field of machinery, in particular to a steel material for a ball screw and a ball screw processing technology. [0003] Background technique [0004] Rolling functional components such as ball screw pairs are key components of machine tools and even numerical control devices. Their accuracy and service life directly affect the machining accuracy and positioning accuracy of machine tools. Therefore, the country spends a large amount of foreign exchange every year to purchase foreign high-precision and large-diameter ball screw pairs to meet the growing market demand. [0005] At present, most domestic manufacturing enterprises use GCr15 bearing steel to manufacture rolling functional parts such as ball screw pairs. The processing route of GCr15 bearing steel manufacturing ball screw: raw material (hot-rolled steel) - normalizing treatment - spheroidizing annealing (φ63-φ160) or spheroi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/24C21D8/00B23P15/00
Inventor 董庆信李保民朱继生杜伟
Owner SHANDONG BEST PRECISION
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